wpf

BackgroundWorker questions.

I have UI WPF application. May by some one have any ideas why this code is not working? Case 1: BackgroundWorker worker = new BackgroundWorker(); worker.DoWork += delegate { //some logic }; worker.RunWorkerAsync(); In that case i am getting exception The calling thread cannot access this object because a different thread owns i...

cannot write in textbox wpf

I have a WPF project (creating dll). The text boxes that added, (or the listboxs) will only accept, COPY, PASTE, DELETE, and BACKSPACE.I do not know why the textboxs have this behavior. The system receives all of the events (KEYUP, KEYDOWN, PREVIEWKEYUP, PREVIEWKEYDOWN, but won't change the text if characters are typed. The TEXTCHANGED...

Onrender Method in WPF

i have drawingcontext object i want to show it this code: public DrawingContext Drwc { get { return drwc; } set { drwc = value; OnRender(value); } } protected override void OnRender(DrawingContext drawingContext) { base.OnRender(drawingContext); } but donot show any element of drawingcontext ...

Disable the WPF designer in VS 2010?

Is there a way to disable the WPF designer (the preview pane, I only need the XAML-pane with intellisense) in VS 2010? Please note that when hiding the Design view of the WPF designer, it will still render the form/control ... I don't consider that disabled. I only see the "Open With" + "XML Editor"-solution, which doesn't give nearly ...

How can I tell if an element matches a PropertyCondition in Microsoft UI Automation?

I'm trying to find an AutomationElement in a particular row of a GridView (so there are many identical elements). I'm iterating over the elements in the row, and I'd like to use a matcher to see if a particular element matches the Condition I'm passing to it. I'm starting with simple PropertyConditions. Here's my test: [TestFixture] pu...

How to increase padding displayed items combobox?

I want to write XAML template of a combobox to increase the spaces/padding between items. I searched for this but almost end up with the ItemsPresenter: <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/...

Partially change a WPF template for a standard control

I have a TextBox control placed inside my window and I would like to change its Border. In order to do this, I have to somehow modify the existing Border set by the default control template. Is there a way to modify only a part of a default control template (for a standard WPF control) by somehow overriding the existing objects? ...

Filtering messages in WPF application

Windows Forms have the IMessageFilter interface to capture messages. How is this done in WPF? Specifically, I want to create a clipboard format listener. ...

Reusing existing templates in custom WPF controls

I am creating a custom WPF control class which inherits from ComboBox. As I am just defining behavior, the exiting ComboBox templates are fine for my purposes and I don't want to created a whole set of templates to support different themes. Is there a way to specify that my control uses the existing ComboBox templates? ...

Are there any controls to edit text with intellisense?

Are there any .net controls (hopefully WPF) to enter queries based on application rule engine (or language definition)? Something like SQL with intellisense or Jira advanced filter? In other words i would like to allow a user to enter something like this into a text area (type='apple' and color='green' and quantity>10) or (type='tomato...

how to execute events in mvvm pattern for silverlight

Can anyone provide a short example of how to execute an event within the mvvm pattern for silverlight? In reading I have seen references to where silverlight does not support commanding? If that is the case how then what is the most common practice to initate methods in the mvvm pattern? Is a third party framework need or can this be acc...

wpf layout-system problem

I'm not too familiar with wpf layout-system. so i'm ready to start and understanding that. at the first of road i have a problem with wpf. so according to below markup, i have 4 button which when we run project everything is true. <Window ... WindowStartupLocation="CenterOwner" SizeToContent="WidthAndHeight" Name="wMessage" ShowInTaskba...

Creating a C# WPF Image Button with a template that I can alter in code dynamically

Hey, I was figuring out how to create an image button template in C# WPF, and I came upon this . This seems really useful to me except for two problems: I want to be able to change the images dynamically in the C# codebehind, as this button will be using images that I am loading dynamically through XML documents. FIXED I'm getting the ...

doing validation in WPF 4 for non-binding attributes - what approach?

How should one handle validation in WPF 4 when there is no binding? Most of the validation doco I am reading seems to be for controls that have bindings. For example, just a main windows with some text boxes that a user would fill out, and then a button someone would then click on. One could do it manually I guess but wouldn't' there ...

C# wiimote library - computing distance from sensor bar to wiimote

I'm working with the C# managed wiimote library for a little fun project I'm working on, But I'm having trouble finding a good tutorial on how to calculate how far the wiimote is from the monitor (i.e sensor bar). I want to create a zoom effect where an object will grow or shrink based on how far back you move the wiimote from the screen...

what's an example of using the WPF validation framework to bubble up validation up the tree?

Hi, I'm reading with WPF part of the benefit of the validation based on binding framework is that validation events might bubble up the tree so to speak. What would be an example of where this would be useful? Just trying to understand. ...

To change gridview cell font size in WPF

Hi I have a gridview in Listview.View in a WPF application. I am using sorting of each grid view column so I need to set display member binding. When I searched in net I got a method using cell template to increase the font size of elements in the grid view. But I cannot use that since I need DisplayMemberBinding property of gridview f...

How to display an image on start of a wpf app ?

Hi I have a wpf application in mvvm pattern. In main view, I have few links to other views. But before displaying the contents(that is ... the links) in main view, I need to display an image in main view ....that means...a welcome image will be displayed first to the user...say for 2 seconds...and then display the actual contents. Can a...

Binding to properties outside of the datacontext

Hey all, I am creating a wpf application and am having a little difficulty implementing an user interface idea I have. I have a MasterViewModel bound to the MainWindow which exposes an observable collection of ViewModels. I have written some commands that essentially switch the current view model in the observable collection and this s...

Any samples or any suggestions to achieve animations likeThirteen23 "blu" application?

Thirteen23 have one twitter client application which is amazing. You can see the demo from this link http://www.thirteen23.com/experiences/desktop/blu/. I want to do some animation like this for my startup/splash screen. Any Sample or suggestion how i can achive thesese kind of animation in WPF. ...